1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
//===-- tsan_defs.h ---------------------------------------------*- C++ -*-===//
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of ThreadSanitizer (TSan), a race detector.
//
//===----------------------------------------------------------------------===//
#ifndef TSAN_DEFS_H
#define TSAN_DEFS_H
#include "sanitizer_common/sanitizer_internal_defs.h"
#include "sanitizer_common/sanitizer_libc.h"
#include "tsan_stat.h"
#ifndef TSAN_DEBUG
#define TSAN_DEBUG 0
#endif // TSAN_DEBUG
namespace __tsan {
#ifdef TSAN_GO
const bool kGoMode = true;
const bool kCppMode = false;
const char *const kTsanOptionsEnv = "GORACE";
// Go linker does not support weak symbols.
#define CPP_WEAK
#else
const bool kGoMode = false;
const bool kCppMode = true;
const char *const kTsanOptionsEnv = "TSAN_OPTIONS";
#define CPP_WEAK WEAK
#endif
const int kTidBits = 13;
const unsigned kMaxTid = 1 << kTidBits;
const unsigned kMaxTidInClock = kMaxTid * 2; // This includes msb 'freed' bit.
const int kClkBits = 42;
const unsigned kMaxTidReuse = (1 << (64 - kClkBits)) - 1;
const uptr kShadowStackSize = 64 * 1024;
#ifdef TSAN_SHADOW_COUNT
# if TSAN_SHADOW_COUNT == 2 \
|| TSAN_SHADOW_COUNT == 4 || TSAN_SHADOW_COUNT == 8
const uptr kShadowCnt = TSAN_SHADOW_COUNT;
# else
# error "TSAN_SHADOW_COUNT must be one of 2,4,8"
# endif
#else
// Count of shadow values in a shadow cell.
#define TSAN_SHADOW_COUNT 4
const uptr kShadowCnt = 4;
#endif
// That many user bytes are mapped onto a single shadow cell.
const uptr kShadowCell = 8;
// Size of a single shadow value (u64).
const uptr kShadowSize = 8;
// Shadow memory is kShadowMultiplier times larger than user memory.
const uptr kShadowMultiplier = kShadowSize * kShadowCnt / kShadowCell;
// That many user bytes are mapped onto a single meta shadow cell.
// Must be less or equal to minimal memory allocator alignment.
const uptr kMetaShadowCell = 8;
// Size of a single meta shadow value (u32).
const uptr kMetaShadowSize = 4;
#if defined(TSAN_NO_HISTORY) && TSAN_NO_HISTORY
const bool kCollectHistory = false;
#else
const bool kCollectHistory = true;
#endif
#if defined(TSAN_COLLECT_STATS) && TSAN_COLLECT_STATS
const bool kCollectStats = true;
#else
const bool kCollectStats = false;
#endif
// The following "build consistency" machinery ensures that all source files
// are built in the same configuration. Inconsistent builds lead to
// hard to debug crashes.
#if TSAN_DEBUG
void build_consistency_debug();
#else
void build_consistency_release();
#endif
#if TSAN_COLLECT_STATS
void build_consistency_stats();
#else
void build_consistency_nostats();
#endif
#if TSAN_SHADOW_COUNT == 1
void build_consistency_shadow1();
#elif TSAN_SHADOW_COUNT == 2
void build_consistency_shadow2();
#elif TSAN_SHADOW_COUNT == 4
void build_consistency_shadow4();
#else
void build_consistency_shadow8();
#endif
static inline void USED build_consistency() {
#if TSAN_DEBUG
build_consistency_debug();
#else
build_consistency_release();
#endif
#if TSAN_COLLECT_STATS
build_consistency_stats();
#else
build_consistency_nostats();
#endif
#if TSAN_SHADOW_COUNT == 1
build_consistency_shadow1();
#elif TSAN_SHADOW_COUNT == 2
build_consistency_shadow2();
#elif TSAN_SHADOW_COUNT == 4
build_consistency_shadow4();
#else
build_consistency_shadow8();
#endif
}
template<typename T>
T min(T a, T b) {
return a < b ? a : b;
}
template<typename T>
T max(T a, T b) {
return a > b ? a : b;
}
template<typename T>
T RoundUp(T p, u64 align) {
DCHECK_EQ(align & (align - 1), 0);
return (T)(((u64)p + align - 1) & ~(align - 1));
}
template<typename T>
T RoundDown(T p, u64 align) {
DCHECK_EQ(align & (align - 1), 0);
return (T)((u64)p & ~(align - 1));
}
// Zeroizes high part, returns 'bits' lsb bits.
template<typename T>
T GetLsb(T v, int bits) {
return (T)((u64)v & ((1ull << bits) - 1));
}
struct MD5Hash {
u64 hash[2];
bool operator==(const MD5Hash &other) const;
};
MD5Hash md5_hash(const void *data, uptr size);
struct ThreadState;
class ThreadContext;
struct Context;
struct ReportStack;
class ReportDesc;
class RegionAlloc;
// Descriptor of user's memory block.
struct MBlock {
u64 siz;
u32 stk;
u16 tid;
};
COMPILER_CHECK(sizeof(MBlock) == 16);
} // namespace __tsan
#endif // TSAN_DEFS_H
|
